I think welly's pretty much right there, but I thought the Rapier was the bargain basement version, S a bit plusher, SE was more or less an exec, but with half leather and lacking the seat memory - not sure about the crap nav tho.

I recently bought a 53 plate S estate just to sell on and was surprised to see the Sat Nav fitted,it was a one owner car and according to the owner it was a demonstrator so perhaps that's why it had it (didn't work though!) but it did have a crystal clear C display though!

It's in a safety deposit box in a bank vault. Actually it's on the shelf in the garage and I don't know whether to sell it or keep it as a spare for my car which also has a totally clear display,at the moment.

I've said this before, but my money is on moisture rather than heat as a cause of lines, of course the fan will help with that as well, drawing air over it and reducing the amount left to settle overnight.

I purchased a perfect c display in the summer, it was fine all summer, but and at the minute when I get in the car I'm missing lines. after a while they return when the air dries out. (i only use the car infrequently as I work from home)